如何在最后一步使用CryptDecrypt解决NTE_BAD_DATA

我正在使用 WINAPI 研究带有 c++ 的加密算法。我的加密工作完美无缺，我的解密也直到最后一个块被解密，最终 = TRUE。我收到NTE_BAD_DATA错误。

PS ：我手动检查缓冲区，解密工作正常，直到最后一个密码解密。

如果有人有想法，请帮助我:)

这是我的代码：

PVOID test(PVOID buffer, DWORD* length, PCHAR key_str2,bool isdecrypt) {
CHAR default_key[] = "3igcZhRdWq96m3GUmTAiv9";
CHAR* key_str = default_key;
size_t len = lstrlenA(key_str);
DWORD dwStatus = 0;
BOOL bResult = FALSE;
wchar_t info[] = L"Microsoft Enhanced RSA and AES Cryptographic Provider";
HCRYPTPROV hProv;
if (!CryptAcquireContextW(&hProv, NULL, info, PROV_RSA_AES, CRYPT_VERIFYCONTEXT)) {
dwStatus = GetLastError();
CryptReleaseContext(hProv, 0);
return 0;
}
HCRYPTHASH hHash;
if (!CryptCreateHash(hProv, CALG_SHA_256, 0, 0, &hHash)) {
dwStatus = GetLastError();
CryptReleaseContext(hProv, 0);
return 0;
}
if (!CryptHashData(hHash, (BYTE*)key_str, len, 0)) {
DWORD err = GetLastError();
return 0;
}
HCRYPTKEY hKey;
if (!CryptDeriveKey(hProv, CALG_AES_128, hHash, 0, &hKey)) {
dwStatus = GetLastError();
CryptReleaseContext(hProv, 0);
return 0;
}
const size_t chunk_size = CHUNK_SIZE;
BYTE chunk[chunk_size] = { 0 };
DWORD out_len = 0;
BOOL isFinal = FALSE;
DWORD readTotalSize = 0;
DWORD inputSize = *length;
PVOID newBuff = VirtualAlloc(0, inputSize, MEM_COMMIT, PAGE_READWRITE);
while (true)
{
if (readTotalSize + chunk_size >= inputSize)
{
isFinal = TRUE;
memcpy(chunk, PVOID((DWORD)buffer + readTotalSize), inputSize - readTotalSize);
out_len = inputSize - readTotalSize;
}
else {
memcpy(chunk, PVOID((DWORD)buffer + readTotalSize), chunk_size);
out_len = chunk_size;
}
if (isdecrypt) {
if (!CryptDecrypt(hKey, NULL, isFinal, 0, chunk, &out_len)) {
int a = GetLastError();
break;
}
}
else {
if (!CryptEncrypt(hKey, NULL, isFinal, 0, chunk, &out_len, chunk_size)) {
break;
}
}
if (readTotalSize + chunk_size >= inputSize) {
memcpy(PVOID((DWORD)newBuff + readTotalSize), chunk, inputSize - readTotalSize);
readTotalSize += inputSize - readTotalSize;
}
else {
memcpy(PVOID((DWORD)newBuff + readTotalSize), chunk, chunk_size);
readTotalSize += chunk_size;
}
if (isFinal)
break;
memset(chunk, 0, chunk_size);
}
CryptReleaseContext(hProv, 0);
CryptDestroyKey(hKey);
CryptDestroyHash(hHash);
return newBuff;

}